The programme involves eating an 850-calorie, plant-based diet devoid of caffeine, sugar, salt or hyper-processed foods, which will ‘activate the body’s fasting mechanisms’ while simultaneously ‘tricking the mind’ into thinking you’re full. To begin with, I was surprised. Creatively and expertly executed, there were breakfasts of puréed or chopped fruit, three-course lunches and dinners of soups, salads and an array of broadly inspired dishes, from cucumber ‘maki’ (hold the rice) to a singular avocado taco. But, alas, there was no fooling my well-trained stomach. Sure, after the third day I felt lighter, more energised and less likely to chew on a table leg, but that’s when the ‘highly recommended’ fast begins. ‘On the regular detox you’re a Toyota; on this, you’ll feel like a Ferrari,’ I’m told, and so for 31 hours, I’m food-free with nothing more than mushroom or ginger and lemon-grass broth for company. Oh, and laxatives.